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Method for preparing vanadium pentoxide/conductive substrate composite electrode material

A technology of vanadium pentoxide and conductive substrates, applied in battery electrodes, nanotechnology for materials and surface science, secondary batteries, etc., can solve the problem of low electronic conductivity and ion conductivity, unstable structure, difficult Commercial applications and other issues, to achieve faster transport speed, good contact, and weaken the effect of sample morphology being destroyed

Inactive Publication Date: 2014-08-13
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the instability of its structure and the inherent low electronic and ionic conductivity, it is difficult to put it into commercial application.

Method used

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  • Method for preparing vanadium pentoxide/conductive substrate composite electrode material
  • Method for preparing vanadium pentoxide/conductive substrate composite electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] a Clean the stainless steel wire mesh, and put the cleaned stainless steel wire mesh into the lining of the high-pressure reactor.

[0026] b Ultrasonic mixing ammonium metavanadate, oxalic acid and sodium dodecylbenzenesulfonate in deionized water to form a mixed solution, wherein the concentration of ammonium metavanadate is 0.2mol / L, and the concentration of oxalic acid is 0.4mol / L, The concentration of sodium dodecylbenzenesulfonate is 0.05mol / L.

[0027] c Transfer the mixed solution prepared in step b to the inner lining of the autoclave equipped with stainless steel wire mesh, react at 100°C for 30 minutes, take out the autoclave and cool it naturally at room temperature, and put the reaction load with di The stainless steel metal mesh of the vanadium precursor was taken out, washed with deionized water, and dried in an oven at 30°C.

[0028] d Take the dried stainless steel metal mesh loaded with vanadium pentoxide precursor obtained in step c, heat it to 300°C...

Embodiment 2

[0030] a Clean the stainless steel wire mesh, and put the cleaned stainless steel wire mesh into the lining of the high-pressure reactor.

[0031] b Ultrasonic mixing ammonium metavanadate, oxalic acid and sodium dodecylbenzenesulfonate in deionized water to form a mixed solution, wherein the concentration of ammonium metavanadate is 1mol / L, the concentration of oxalic acid is 3mol / L, dodecylbenzenesulfonate The concentration of sodium alkylbenzenesulfonate is 0.17mol / L.

[0032] c Transfer the mixed solution prepared in step b to the inner lining of the autoclave equipped with stainless steel wire mesh, react at 180°C for 90 minutes, take out the autoclave and cool it naturally at room temperature, and put the reaction load with di The stainless steel metal mesh of the vanadium precursor was taken out, washed with deionized water, and dried in an oven at 100°C.

[0033] d Take the dried stainless steel metal mesh loaded with vanadium pentoxide precursor obtained in step c, h...

Embodiment 3

[0035] a Clean the stainless steel wire mesh, and put the cleaned stainless steel wire mesh into the lining of the high-pressure reactor.

[0036] b Ultrasonic mixing of ammonium metavanadate, oxalic acid, and hexamethylenetetramine in deionized water is made into a mixed solution, wherein the concentration of ammonium metavanadate is 0.5mol / L, the concentration of oxalic acid is 1mol / L, and the concentration of hexamethylenetetramine The concentration of tetramine is 0.1mol / L.

[0037] c Transfer the mixed solution prepared in step b to the inner lining of the autoclave equipped with stainless steel wire mesh, react at 150°C for 50 minutes, take out the autoclave and cool it naturally at room temperature, and put the reaction load with di The stainless steel metal mesh of the vanadium precursor was taken out, washed with deionized water, and dried in an oven at 60°C.

[0038]d Take the dried stainless steel metal mesh loaded with vanadium pentoxide precursor obtained in step...

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Abstract

The invention relates to a method for preparing a vanadium pentoxide / conductive substrate composite electrode material, which is applicable to a lithium ion battery cathode material and belongs to the technical field of energy storage. The preparation method comprises the following steps: reacting a conductive substrate in a mixed solution consisting of ammonium metavanadate, oxalic acid, a surfactant and deionized water by a hydrothermal method so as to obtain a conductive substrate loaded with a vanadium pentoxide precursor, and sintering the conductive substrate loaded with the vanadium pentoxide precursor to obtain the vanadium pentoxide / conductive substrate composite material. By adoption of the hydrothermal reaction and the sintered vanadium pentoxide-loaded conductive substrate, damage to sample morphology in a lithium ion deintercalation process is weakened, and the cycling stability of vanadium pentoxide is enhanced. The nanocrystallized vanadium pentoxide material has large superficial area and is good in contact with electrolyte, the diffusion distance of lithium ions in the material is shortened, the transport speed is increased, and the high rate of the electrode material is realized.

Description

Technical field [0001] The present invention involves a preparation method of a five oxidation two -钒 / conductive base composite electrode material. It is used for lithium ion battery cathode materials and belongs to the field of energy storage technology. Background technique [0002] Lithium -ion battery is a recognized ideal chemical energy today internationally. It has the advantages of small size, large electrical capacity, and high voltage. It is widely used in electronic products such as mobile phones and computer computers.More room for development.The characteristics of lithium -ion batteries depends on its electrode materials, especially cathode materials.The five oxidation two -cathode material, because it has the characteristics of layer -shaped structures that accommodate a large amount of lithium ions, have high theoretical compared capacity, rich resources, low prices, etc.one.However, due to the instability of its structure and the inherent electronic conductivity ...

Claims

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Application Information

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IPC IPC(8): H01M4/48B82Y40/00B82Y30/00
CPCH01M4/362H01M4/48H01M10/0525Y02E60/10
Inventor 方东徐卫林李力成刘欣
Owner WUHAN TEXTILE UNIV
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